820021725

素因数分解:

$3^5\times 5^2\times {\mathrm{347}}^1\times {\mathrm{389}}^1$

素因数の和:761

約数の個数: 72

約数和(自身を含む): 1531464480

約数和(自身を除く): 711442755

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 243, 347, 389, 405, 675, 1041, 1167, 1215, 1735, 1945, 2025, 3123, 3501, 5205, 5835, 6075, 8675, 9369, 9725, 10503, 15615, 17505, 26025, 28107, 29175, 31509, 46845, 52515, 78075, 84321, 87525, 94527, 134983, 140535, 157545, 234225, 262575, 404949, 421605, 472635, 674915, 702675, 787725, 1214847, 2024745, 2108025, 2363175, 3374575, 3644541, 6074235, 10123725, 10933623, 18222705, 30371175, 32800869, 54668115, 91113525, 164004345, 273340575, 820021725]

約数ペア:

[(1, 820021725), (3, 273340575), (5, 164004345), (9, 91113525), (15, 54668115), (25, 32800869), (27, 30371175), (45, 18222705), (75, 10933623), (81, 10123725), (135, 6074235), (225, 3644541), (243, 3374575), (347, 2363175), (389, 2108025), (405, 2024745), (675, 1214847), (1041, 787725), (1167, 702675), (1215, 674915), (1735, 472635), (1945, 421605), (2025, 404949), (3123, 262575), (3501, 234225), (5205, 157545), (5835, 140535), (6075, 134983), (8675, 94527), (9369, 87525), (9725, 84321), (10503, 78075), (15615, 52515), (17505, 46845), (26025, 31509), (28107, 29175)]